Water-tube-fire-box boiler.



W. F. W. HENRY.

WATER TUBE FIRE BOX BOILER.

APPLICATION FILED DEC. 15. 1914.

1,1 52,021. Patented Aug. 31, 1915.

2 SHEETS-SHEET I.

W. F. W. HENRY.

WATER TUBE FIRE BOX BOILER.

APPLICATION FILED DEC. 15. 1914.

1 1 52,02 1 Patented Aug. 31, 1915.

2 SHEETSSHEET 2.

4 C \(am C O Q C) G G O Mk 6 J)? Q 6 Zzrz'i wens may, 1 {Q- 2 In V6)? 502',

, I? M He/vr' m gym NI ED STAT MEN 1 OFFER WILLIAM F. w. HENRY, or HAMMOND, INDIANA.

, WATER-TUBE-FITRE-BOX BOILER.

" Application filed December 15, 1914. Serial No. 877,335. I

To all whom itmag concern:

. pertains to make and use the same.

. teni employing radiators located at different -purpose to provide a boiler of this type boiler adapted especially for heating pur-- poses, or in connection with a heating syspoints throughout the building.

In carrying out my invention it is my wherein the water in its circulation through the boiler-structure will beconstantly subwater may be quickly and readily heated."

A further object of my invention is the provision of a boiler wherein the fire box is equipped with groups or banks of water tubes located at the sides of the water drum, beneath such water drum and at the rear thereof, the varioustbanks of tubes being connected in the circular system of the boiler so that the efficiency and'econoniy of the lat-' ter is greatly increased.

I also propose to provide a boiler wherein the various groups or banks of tubes may be easily, quickly andconveniently, cleaned,

and wherein, when desired. wornout or damaged tubes may be readily replaced with new tubes. I Another object of the invention is to pro vide a boiler of this class which'will embody. the desired features of simplicity, durability,

and wherein a maximum heating capacity is attained with a minimum consumption of" bank 2.1111116 between the bars of the grate, and this grate which is preferably of the fuel. 1

With the above recited objects and, other of a similar nature in view, my invention consists in the construction, combination and In the accompanying drawings: Figurel V is a view partly in elevation and partly in longitudinal section of a boiler structure embodying my invention, with the arrows indicating the course of the heated gases. Fig. 2 is a-View inside elevation ofa water tube fire box boiler embodyingmy invention, the

' tubes extending therethrough.

jected to the action of the heat so that the 7 I a of tubes, one bank being locatedat each side boiler setting being omitted. Fig. 3 is a ver- I Specification 5f Letterslfatent. P t te 31, 1 '15 sectional viewtaken on the line 7-7 of Fig. 1. F gi 81s a vertical sectional view taken 1 througha portionof one of the frontwater legs or headers and showing the connection of one of the water tubes 22 and one of the short tube sections 23. '4

Before entering into a detailed description of'my invention, I will briefly state that it embodies among other features a water drum having the usual horizontally disposed fire I To this water drum I connect four banks or groups of the furnace, substantially horizontal, one

bankbeing located below the water drum-- with the tubes ofthis bank lying between the bars of the grate, as shown inFig. 7 and one bank being located beneath and at the rear of the drum, this latter bank being inclined be readily and quickly cleaned, or even replaced when desired, the'short tubes or nipples being removed for these purposes. The tubes are alternate with the lower or bottom rocker type, may be raised and lowered to decrease or increase the space between the bottom-or lower bank of tubes and the grate bars for the purpose of accommodating dif-' ferent grades and sizes offuel.

Referringnow to the accompan ing drawingsin detail. the letter A indicates the furnace structure as an entirety, of which 1 is the bridge wall, 2 the ash pit, and 8 the front wall. The rear of the structure is provided with the clean out door 4, while the front 85 upwardly and rearwardly, preferably at an angle --of approximately forty-five degrees, and it" is, of course,to be understood that all of the furnacehas the usual ash pit'door 6, the fire door 7 and the clean'out door 8 lo cated above the fire door. The combustion chamber of the boiler is indicated at C, and

in the upper portion of this chamber is located the water drum' Dywhile Eindfcate's the passage for the heated gases and products of combustion leading to and communieating with the rear flue connected with the chimney in the usual manner. The water drum is provided with the usual supply inlet, and from the top of the drum leads a discharge pipe 9 from whieh branch pipes lead throughthebuilding to the vari; ous radiators Asthese' pipes and radiators forming'part of the heating system,; do not enter into the present case, they need not be described in detail. 1 v r :5 a

The water drum D is provided with the usual bank of horizontally disposed spaced parallel fire tubes indicated at ,1.(),. these tubes opening up through the f ron t and rear heads 11; and 12 ofthe drum respec tively. The side walls of'fithe boilerstructure A arebuilt to provide thelovver ylongitudinally extendingledgesld and the upp l git din l y ex endi overh g n ledgesle. v,Theseside walls are lined with fire brick or other 7 refractory material, at 5, w eth upper P rti n ru D e d t o h th oof .lfiiof t e see bast chambr,- sl roofbe ns. als ie'd offire proof brick or jrother refractory material, and forms the flpor of the horizontal section of the passage forward ends rolled or expanded in the nipples 20 in theusual manner, while the rear ends of ,these tubes fare threaded and secured into the nipples 21 so that-the tubes 22 connect the nipples 20 ofzeach frontwater legwith ,the nipples 21 0f eaeh rear water leg on the 'same side of the combustion chambeini Threaded into eaehnipple 19 as *shownin Fig, 8Hi's a relatively short forwardly extending tube, 23 which extends through the front walljof the furnace and-is closed bya cap 24. The vertical banks of tubes made up of these short tubes 23are intended to facilitate the cleaning and repairing of the side banks of tubes, as hereinthe upper and lower ends of the rear vertically inclined water legs 18 terminate in similar -T-couplings shown at 27 and 28,

respectively. Extending horizontally between and connected to the lower T-couplings 26 of the water legs 17 is a header 29 which extends above and across the'front of the grate T. A similar horizontally disposed header 30 extends transversely between and is connected to the T-couplings 28 at the lower ends of the rear water legs 18. A bank of horizontally disposed water tubes shown at 31 connects the transverse horizontal header 29 with the transverse horizontal header 3'0, and it will be seen by reference at Fig. 7 of the drawings the tubes of this horizontal bank of tubes 31 are alternate with and lie between the bars of the grater Thus the burning fuel or firelies directly on this bank of tubes which 7 is thus subjected to internal heat. Dependzontal header 34, this header lying preferably directly beneath the drum, and, of course, is elevated a considerable distance above the lower horizontalbank of tubes 31. Abank of tubes35, inclined at an angle of pireferably about forty five degrees, connects this rear transverse header 34 with the lower header 30. As will be seen the lower header 3O rests upon the shoulder 35 7 cut in the bridge wall, while this bridge wall is rearwardly inclined or cut away as at to permit the erection of the inclined bank bf tubes 35.' The tubular dead ends 35f are;.provided for the header 3% and the bank of tubes 35 so that the header may. be

readily cleaned. These dead ends are closed bycaps 37which may be removed for cleaningand repairingyand access to the rear bank of tubes may be had through the clean outdoor A. In order to fasten each of the vertical water legs to the sides'of the water druml provide'a connection between each leg the drum which, as will be seen by reference to Fig. 5, includes a flanged collar 38 fastened to the side of the boiler, and between which collar and the jam nut 39-is clamped the upper. T-coupling or head of the water leg, suitable packing rings 10 being interposed in they connection. Threaded onto the connectionthus formed, is a tubular shank ll, the bore of which communicates with the opening -12 in the side of the 1 boiler, andthisshank is provided with a head 43 so that the shank may be unscrewed or removed from the joint for the purpose of cleaning. This tubular shank is further provided with a port 44: for the circulation of the water. At the lower end of each waterleg ls'a connection coniprisingja am 1 nut 45 between which and the adjacent end of the Tcoupling of the leg is a packing o ring 46. A tubular shank 47 projects through the wall ofthe furnace and com-, municates withfthe lower -header,-each of .these tubular shanks 47 being adapted to have the ends 48 of the radiator pipes R connected therewith.

The grate T includes the grate bars I, and a pair of parallel supporting bars 49 arranged above and at opposite sides of the -rearward of the combustion chamber to the ash pit, these supporting bars being slotted as at 50 for the reception of the rocker bars 51. As shown in Fig. 7, the grate bars t are arranged alternately relative to the'tubes of the lower bank of tubes 31, and thedepending webs 52 of these grate bars. Each rock-shaft 51 has one of the grate bars thereon provided with a depending web 53, and these webs are pivoted as at 54 to the operating bar 55, the forward end of which extends through vthe ash pit door and which is pivotally connected at 56 to the rocking" lever 57 the latter being pivoted at its lower end as at 58 to the bracket 59.1'The rocker.-

grate is adapted to be adjusted to and from the lower horizontal bank of tubes 31 by raising and lowering the rocker bars in their slots, suitable adjusting bolts 60 being provided for maintaining the bars in their ad- JHSteCl posltion.

From the above description, taken in connection with the accompanying drawing, the construction and operation of my improved boiler will be apparent to those skilled in the art.

lVhen the boiler is in use, the burninggases issuing from the fire on the grate and lower bank of tubes 31, pass up and around the side banks of tubes, these gases flowlng rear inclined bank of tubes heating the latter, and thence through the rear of the combustion chamber, to and through the tubes 10 in the water drum to the front of the furi nace, thence upward and rearward through tubes, but also pass and heat the rear in-' the passage E and out through the flue F, as is indicated by the arrows in Fig. 1'. It

will be noted that the gases in their transit,

not only pass and heat the side bank of clined bank of tubes 35, and also passing through the tubes 10 of the drum, these gases heating the water in the drum. The result is a complete heating of the'water acarrying sections of the boiler, for it will 34, thus down the inclined'bank of tubes 35 to the lower header 30', thence through the rear inclined Water legs -18,-to the sidebanks of tubes 22-to the front water legs and to the boiler, the heatedwater leaving th boiler through the pipe 9. c

It will be noted that I have provided an exceedingly simple, yet efiicient and eco nomical form of boiler which may beread- 11y cleaned whenidesired, and in which av relat vely great heating area is provided for the water, the circulating system of the boiler being brokenup into banks or'groups of water tubes through which the water maypass 1n such manner as to be subjected directly to the heat from the fire and from the heated gases.

When it isdesired to clean the mud, scale and other foreign matter from the side 1 banks oftubes, the caps24 on theshort sections of tubes 23 may be removed, and as these short tubes'23 are of greater cross diameter than the water tubes 24, ready access may be had to the latter with the usual tube cleaner. If it is desired to remove a damaged tube from the side bank of, tubes, that is to say to replace one of the tubes 22, the short pipe section 23 opposite the damaged tube is unscrewed and removed, and as the nipple l9into which this short section 23 is screwed, 1s conslderably larger in cross diameter than the alining pipe, entrance with a chisel or other tool may behad through this nipple to reach the upset or expanded end of the damaged tube. The latter is then cut or broken down and unheader. The new tube is now passed through the alining nipples.19 and 20 in the front water leg to the alining nipple on the rear water leg into which the rear end of the plpe is screwed. The usual ferrule is placed aroundthe front end of the tube, and a tube V expander isemployed to expand the end of the tube in the usual manner to make it wa-- ter tight with the water leg. The short tube screwed at its other end from the rear.

23 is then'replaced. Tubes of the bottom bank and of the rear or inclined bank may be cleaned and removed and replaced. in substantlally the same manner.

While I have herein shown and described my invention as embodying particularly the form of boiler structure adapted especially for hot water heating, it will be evident that it may be readily embodied in the form of a boiler for steam heating purposes, it being only necessary to reduce the height of thetbank of tubesin the drum and locate the smoke box at the front end of the boiler instead of at the back end, suitable water gagesbeing'set in the drum at proper points to indicate the height of the water. 1

While I have'herein shown and described one particular embodiment of my invention, I wish it to be understood that I do not confine myself to all the precise details of con bank of fire tubes extending through the water drum, a bank of water tubes located at each side of the combustion chamber and communicating with the water drum, a horizontally disposed bank of tubes located at the grate and communicating with the side banks of tubes, and a rear bank of tubes communicating with the lower bank of tubes and with the water drum.

2. In an apparatus of the class described, the combination with a furnace including the grate, the combustion chamber and the passage for the products of combustion leadi ing to the chimney flue from the combustion chamber, of a water drum, a bank of fire tubes extending through the water drum,"

vertically disposed front and rear water legs located at the sides of the combustion chamber and connected with the Water drum, tubes connecting the front and rear water legs, a front header at the lower ends of the front water legs, a rear header at the lower ends of the rear water legs, a bank of tubes connecting said headers and located at the grate, a rear header located above the header at the lower ends of the rear water legs, an inclined bank of tubes connecting the last two headers, and a connection between said rear header and the drum.

3. In an apparatus ofthe class described, the combination with a furnace including a grate, the combustion chamber, and the passage for the products of combustion leading from the combustion chamber to the chimney flue of the furnace, of a water drum, fire tubes extending through the water drum and through which the products of combustion pass, from the combustion chamber to the passage, a bank of tubes located at each side of the combustion chamber and provided with front headers, and banks of tubes extendingfrom the front headers through the front wall of the furnace.

L. In an apparatus of the class described, the combination with a furnace including a grate, the combustion chamber and the passage for the products of combustion leading from the combustion chamber to the chimney fiue of the furnace, of a water drum having fire tubes extending therethrough and through which the products of connected at their upper ends with said header and lying above the bridge wall of the furnace, a second header to which the lower ends of the inclined bank of tubes are connected, a bank of tubes located at each side of the'combustion chamber, rearwardly inclined water legs to which the rear ends of the vertical banks of tubes are connected, said water legs being connected to the drum and to the lower header, front vertically disposed water legs to which the front ends of said vertical banks of tubes are connected, the upper ends of said water legs being connected with the drum, a front header to which the lower ends of said front water legs are connected, horizontally disposed tubes lying between the bars of the grate a connected with the front and rear headers, ind banks of tubes connected with the front ater legs and extending through the front walls of the furnace, and a clean out device for said headers and tubes.

5. The combination with a furnace including the combustion chamber and a grate therefor, of a water drum, a bank of tubes located at each side of the combustion chamber and communicating with the water drum, and a substantially horizontally disposed bank of tubes located at the grate and communicating with the side banks of tubes.

6. The combination with a furnace and a water drum, of a bank of tubes located adjacent the combustion chamber and communicating with said drum, a header for the bank of tubes, and a supplemental bank of tubes connected with the header and ex tending through passages in the wall of the furnace, said supplemental tubes alining with the tubes of the first mentioned bank of tubes.

7. The combination with a furnace including the combustion chamber and a grate therefor, water drum, a bank of water tubes located at each side of the combustion chamber and communicating with the water drum, a substantially horizontally disposed bank of tubes located adjacent the grate and below the water drum and communicating with the side banks of tubes, and a bank of tubes communicating with the horizontally disposed bank of tubes and with the water drum.

In testimony whereof, I affix my signa-' ture, in the presence of two wltnesses.

JULIUs TAUssmc, Josnri-r H. Connor.

Copies of this'patent may be obtained for 'five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

